Park in one of the car parks near the Conches landing stage in Damvix on the D104.
(S/E) At the village exit sign, turn right towards Camping des Conches, Rue du Grand Port. Continue straight ahead until you reach a bridge crossing the Grande Rigole or Garette canal. Cross the bridge and continue straight ahead.
(1) At a T-junction 300 metres from the bridge, turn left. Continue along the main footpath (wide white path).
(2) At the first houses at the Devise crossroads, turn left towards Arçais.
(3) Join and follow the cycle path that runs alongside the D101 for about 100 metres.
(4) Then turn left onto the cycle path at the "impasse" sign to reach the centre of Arçais via Rue du Coursault. At the junction with the D102, turn left and then left again at the next junction to pass in front of the church and join Rue du Grand Port.
(5) At the boat hire, turn right and follow the Bief de la Garenne north-east. At the intersection at a bridge, continue straight ahead on the Chemin du Bief Minet to reach the Sèvre Niortaise. Continue for about 300 metres until you see a sign for a "barque à chaîne" (chain boat).
(6) Take the chain boat to cross. Once on the other side, turn left and follow the Sèvre to the Damvix locks.
Then return to the starting point by crossing the Sèvre again (S/E).